phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('5ee30da0970b2e8af6a133d8202b0cf5', -1, 1713948123, 1713948123, '12e1d15f', 2, 0, 0)

Line : 187
File : sessions.php